Pros: Excellent location! It's right in the middle of Pratunam and less than 15 minute walk to Siam Paragon. Very hospitable host. Clean and comfortable beds. Spacious bedrooms and bathrooms. There's even a crib in one of the bedrooms! Good showers. Very nice dining room.
Cons: The place can be a bit hard to find for taxi drivers because it's in an alley and it's in an older neighborhood. This is the additional information that you need to tell the driver:
The house is in Alley 22, off of Petchaburi Street. The alley is across the street from Shibuya shopping center. Beware of the stairs! We didn't realize we could ask the host' staff to help with the luggage, so we had to lug our heavy suitcases all the way up to the fourth floor. =( The place is not as polished as it looks in the pictures. You can definitely tell that it was remodeled from a very old and grungy place. The layout of the unit was strange. There was no actual kitchen. The double bathroom was literally right next to the dining room, connected by a super wide opening. Someone sitting at the dining table can see you going into the toilet. None of the bedrooms had doors, just curtains. I didn't feel like I had much privacy at all.
Overall, a decent place to stay, given the location and the host's great hospitality.